Milking machine



' Aug.. 4, 1925.

R. L. HINMAN MILKING MACHINE Filed March 51, 1921 2 Sheets-Sheet l Aug. 4, 1925.1 ,548,@37

R. B .HINMAN MILKING- MACHINE Filed March 3l, v1921 2 Sheets-Sheet 2 Patented Aug'. 4,' 1925.

- UNITED STA RALPH L. Human, or oNmDA, `Naw Yoan.

munie meme. l Y

Application mea man s1,

To all whom t may concern:

Be itknown that L RALPH L. HINMAN, of Oneida, in the countyvof Madison, in the State of New York, have invented new and useful -.Improvements in Milking Machines, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to certain improvements in milking machines.`

The primary object of the invention is.the\ production-of an efficient, portable'inilking machine, constituting in itself af complete' milking unit. The machine is of a powerdriven characterutilizing .motor means, preferably of an electrical nature.-

AThe accomplishmentof the said primary object in a preferred manner necessitates not only the production of a machine which shall be comparatively small, and of a weight capable ofbein easily transported by a single individual, ut also the production of a machine of simple, and as faras' may be, inexpensiveA construction, without in any way sacrificing 4the mostl eiiicient vmethod of operation.

A machine'fof this character can be. used in anydesired place where proper electrical connections can be made, assuming that an electrically operated motor is applied, and avoids entirel the necessity of permanent installation o the machine in a stable, including the positioning of drive-rods andother movable or fixed parts upon or about the stanchion.

Another objectrelates to the provision of means for preventing milk from being drawn into the pumpA under conditions where the vacuum chamber fills or substantially lls.

Other objects andadvantages relate to the details of construction, as for instance, the construction of the piston of the machine, all aswill more fully appear from'the following description taken in connection with the accompanying drawings in which Figure 1 is 'an elevation of an apparatus of my invention. 4

vFigure 2 is a view partially in section of` the gear casing and pum l F1 re 3 is a sectiona view of the valve cham er. v v

Figure 4 is an elevation of the gear casing and pump.

1921.V serial ma 457,201.

Figures 5 and 6 are sections through the piston, one being taken at right angles to the other.

The apparatus of this invention comprises a frame 1 consisting of la substantially horizontally arranged plate-2 having one end connected t'o a gear-casing or housing -3-., and its opposite end connected to the lower hportion of an angle bar .-`4-, oneend `of which constitutes aportion of thesupporting means for the apparatus, the other end of which is connected to the gear-casing -3-. The angle-bar 4-, as shown, is adapted to constitute a handle for carrying the apparatus, and for that purpose is provided with a suitable grip -5-, positioned so that the motor A- will balance the gearing and pump as near as may be required.

The gear-casing preferably consists of two parts of generally circular form, and of more or less cu -shape character, `having their o en 'ends acing ,each other, to form a' housing for the gearing hereinafter described. Preferably, these sections, as stated, are of more or less circular form each being provided at its u per end with an upwardly tapering extenslonadapted to form a throat leading lfrom the casing proper to the interior of a pump-cylinder -6--, and preferably the pump cylinderl is of such a diameter as to fit the upper end of the throat. `-7- of. tl'1e-casing '-3- vand may be secured thereto 'in any suitable manner, as by bolts -8'-.

preferably provided with a, pair of legs lO- and -11- which in Y'conjunction with the leg -12- formedon the angle bar -4-', constitute a threepoint support. for

the apparatus. The section -13- 1s preferably provided vwith a downward extension -16- of somewhat semi-circular character,

somewhat laterally from the section 13 to' forma lrecess within which Ithe gear casing, and is in mesh wit the relatively small gear -17- mounted upon the armaland this downward extension also projects gear -4-14-'- upon the shaft -15-. This shaft also carries the relatively small gear adapted yto mesh with the large gear -21- which gear at an eccentric polnt thereon carries a sub-shaft -22- upon which the lower end of the piston rod -23- is journaled. This piston rod projects verticall or substantially vertically, through the t roat -7- andat its upper end carries the piston Q4- which moves in the cylinder -6- for the purpose of producing vacuum in the valve cham er -25-.

By the gearing shown, the speed of the motor is transmitted to the piston rod -23- at a rate best suited for most eliicient milking. This speed may vary somewhere between 42 and 50 R. M.

The upper end of the pump cylinder 6e is provided with a nipple 26-. which may be 'connected to the nipple -27-- of the valve chamber -25- in any suitable manner, as by the flexible tubin -28-. The construction and method oV operation of the valve chamber w25- is generally similar to that of the structure of lle-issue Patent 13,876 'dated February 9, 1915, except that the detachable head portion -29- is formed with a ydepending substantially cylindrical flange -30-' surrounding the outlet communicating with the nipple -27- and of. fsomewhat largerinterior diameter than the nipple Q7- and depending within the -valve chamber a suitable distance for the purpose hereinafter described.

As shown, the flange 3U- extends a short distance below the lower edge of the head section -Q9- -but it will be understood that various cha es and modifications may be made in this exact structure,

and the particular size is not essential to the invention. lVitliin this cylindrical flange 30- is arranged a float valve -31- which may be of any suitable material, such as rubber, adapted to close the opening -32- leading to nipple 27- when liquid fills the chamber -25 to a-height suflicient to elevate the ball -31- into a position closing the opening 3Q- The object of this construction is to revent milk being drawn through nipple -2 and into the pump, shouldthe valve chamber at any time substantially fill with liquid. The float valve 31- may be supported within the cylindrical flange in any suitable manner as by the cross-bar, or Wire 3S- having its ends mounted in opposite sides of the flange -30- and preferably having .its centra-l portion bent downwardly somewhat to normall support the ball in the central portion of t e chamber within the flange 30- to permit the free passage of air upwardly toward nipple -27 when the vacuum devices operate to draw air from .the valve' chamber 25 to produce vacuum therein, by meansv of which milk is drawn into the chamber through tangential nipple 34- connected in any suitable way as by flexible hose -35- with teat cups not shown. Discharge from the chamber is by automatic valve l It will be understood that although we have shown this particular construction as applied to the valve chamber of Reissue Patent 13,876, its application is general to Valve chambers of this type, and we do not desire to limit ourselves to the particular construction of the valve chamber, except as set forth in detail in the claims hereto appended.

The piston 24- illustrated in enlarged section, Figures 5 and 6, is of somewhat peculiar and novel construction, particularly eflicient for the purposes of operation in connection with the apparatus shown. This piston comprises a guide section -35- of substantially circularform, carryingxa cross cylinder 36- loosely mounted therein forrotaryand longitudinal movement, to which cross-cylinderthe upper end of the piston rod -23- is rigidly secured. 'As illustrated, the piston rod may extend through the cylinder -36- and be pinned thereto in any suitable manner. The cylinder 3G- being free to rotate and to move longitudinally, is limited only by the contact of the piston rod with the wall, or recess 6l-- kwhich recess is considerably larger than the piston rod and permits longitudinal movement and rotary movement suilicient to permit proper angular disposition of the piston rod -23- with respect to the guide section -35- during rotation of the gearv The cup leather -37- is secured to the guide section B5--` in a new and novel manner, in that it is mounted upon a bolt -38- which may, as shown, have a threaded relation with the section 3.5- and may be spaced a pre-determined distance therefrom by sleeve -39- cup leather -37-, washer 4410- and plate -41-,' cup-leather 37- being disposed between the plate -41 and the washer -40, all of the parts so far described being rigidly held at their engag` ing portions by the bolt -38 and sleeve 3 A i,

For the purpose of resilientl su ortinc the outer portion of the cup-lelaitheiip--l in desired posit-ion, the supporting plate 42- is provided having at its outer edge a somewhat conically shaped flange- 43- adapted to shape the outer edge of the cupleather. This supporting plate 42- is mounted upon the sleeve -39- and is held Upon the upward to move rearwardly or downwardlly against the action of the spring -44-`, so as to relieve the positive positioning of theA outer surface of the cupleather.37v, permitting the cu -leather to flex, or bend downwardly somew at away from the plate -41. The operation o f this will bev readily understood from the sections disclosed in Figures 5 i I v scribed comprising a ear casing having an thereof, an elongated and 6. v

The two sections of the ease' may be secured together yin any suitable manner, a by bolt The operatlon of the apparatus-'will be readily -1 understood from 'the vabove descripton. The rotation ofthe armaturefshaft drives thepiston rod throu h Vthe gearing .described thereby Aalternate y producing and lreleasing' the pressure in the valve chamber ---jto permit its automatic operation in` a-,manner well known.

.The apparatus above described is light 1 and easilyportatable by a single individual.

In the particular constructions heretofore made, an apparatus has been constructed which weighed in theneighborhood of 40 pounds, and has been found .to be` highly etlicient in effecting the operation of milk- A relatively small motor may be used, and the particular a paratus referred to embodies a-motor o f a out lsjH. P.

Although I have shown and ldescribeda specific construction and details of form and arrangement of theparts of the apparatus as constituting a perhaps Tpreferred vembodiment of my invention, I'do not desire to limit myself to the ldetails of construction,

form or arrangement ofthe parts, as many and variousfchanges may be madein each of ythe same without departing from the 1nvention as set forth in the appended claims.

I claim; 1. An-l apparatus of the character dei scribed comprisingA a frame, a motor mounted within the frame, a gear casing connected to one end of the frame, gearing withinthe casing, :said motor connected to drive said gearing, va pump cylinder, a piston movable Ywithin the cylinder, and a piston rod connected to the pistonsand driven by said gearing av vacuum chamber and means connecting the vacuum chamber to the pump cylinder.

2. An apparatus of the character described comprising a substantially horizonltall I-arran ed U-sha ed frame, with a le projectin ownwan y from the closed en of said rame, a vertically-arranged gear stilltmp v 'wit A1n the c linder driven casing .connected tothe open end of said frame, a motor -mounted on said frame, gearing within said casing driven by said mtor cylinder and ai iston arrange y said gearing a vacuum c amber and means conn ting the vacuum chamber to the' pump cylinder.k

opening through a w cylinder connected to. said gear casing with one of its ends in alignment with' the'opening-in the gear casing, a piston in said cylinder a piston rod connectedto said piston van extending through'the o' ning in the an casin', gearing in -sai cation with the other i en 4. An apparatus of the "character vdescribed comprising a ear casing having an opening through a wal thereof, an elongated cylinder connected to said gear casing with one of its ends in alignment with the opening in the gear casing,-a piston in Asaid cylin-` der, -a'piston rod connected to said `piston and extending through the openin inthe 3. :An apparatus of the character de,-

casing for riving sai piston rod, a ipe'in communidlof the cylinder yand a vacuum chamber in communication f with said pipe.

gear casing, gearing in said casing or drivmg said piston rod, a vacuum chamber, means connecting the vacuum chamber to the said cylinderv a U-sha ped frame having its legs connected at their vfree ends tothe gear casing, a motor mounted on said frame,

anddisposed within the rame, vand driving the motor and the .necting the vacuum chamber to the cylinder, and-a float valve within the vacuum chamber rand controlli the communication between the 'vacuum' c amber and saidcylindenv In witness whereof I 'have' rhereunto set my hand this 24th day of-'March 1921.

RALPHL,

Witnesses:

Jnssm E. W. Las Enron.

the frame and connected los' 

